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Rainbow Pitta Pitta iris Scientific name definitions

Johannes Erritzoe
Version: 1.0 — Published March 4, 2020
Text last updated July 23, 2013

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Field Identification

16–18 cm; 55–72 g. Adult has head and neck black with broad chestnut lateral crownstripe, upperparts bright olive-green, sometimes a narrow silvery green-blue band across uppertail-coverts, tail green with black base; large shining violaceous-blue patch on lesser coverts, rest of upperwing-coverts green with golden gloss; flight-feathers blackish, secondaries edged green, primaries tipped paler and with small white spot near base; all black below , except for some buff feathers on lower flanks, scarlet lower belly and undertail-coverts; iris dark brown; bill black; feet dusky pinkish to silvery grey or reddish-grey. Sexes alike. Dusky stripes found on green and blue upperparts of 60% of 23 adults examined (both sexes, both races). Juvenile is duller than adult, little or no chestnut on crown, little blue on wing, white-mottled throat, pale pinkish vent, orange base of bill. Race johnstoneiana is slightly smaller, with larger rufous-brown stripe on side of crown, larger white wing spot.

Systematics History

Editor's Note: This article requires further editing work to merge existing content into the appropriate Subspecies sections. Please bear with us while this update takes place.

Formerly considered conspecific with P. versicolor, but differs significantly in plumage, biometrics and voice. Two subspecies recognized.

Subspecies


SUBSPECIES

Pitta iris johnstoneiana Scientific name definitions

Distribution

NW Australia in NW Kimberley Division (mainly from Napier Broome Bay S to Prince Regent R), including Augustus I and islands in Admiralty Gulf.

SUBSPECIES

Pitta iris iris Scientific name definitions

Distribution

N Northern Territory, from Melville I and Darwin E to Groote Eylandt.

Distribution

Editor's Note: Additional distribution information for this taxon can be found in the 'Subspecies' article above. In the future we will develop a range-wide distribution article.

Habitat

Monsoon rainforest, gallery forest and vine scrub, also eucalypt (Eucalyptus) forest, and sometimes found in bamboo thickets and mangrove edges; occasionally recorded in pine (Pinus) plantations. Sea-level to 380 m.

Movement

Sedentary.

Diet and Foraging

Worms, snails, insects and their larvae, also other arthropods such as spiders, centipedes (Chilopoda), millipedes (Diplopoda); occasionally frogs, small skinks (Scincidae); rarely, fruit of Carpentaria palms. Insects mainly beetles, cockroaches (Blattodea), ants, orthopterans. Earthworms and snails form major part of diet during Oct–Apr wet season; insects eaten mostly during dry season. Snail shells smashed against branch or exposed roots; large prey seized with bill and shaken, dropped, then picked up and shaken again, process repeated several times. Forages on ground, making a number of hops and then pausing to inspect leaf litter; scratches soil or litter with foot, tosses aside leaves with bill.

Sounds and Vocal Behavior

Double whistle , "teow-whit, teow-whit" or "choowip-choowip", often likened to human phrase "I want a whip", or sometimes first note omitted, often repeated in series during Oct–Dec; loud sharp "keow" as alarm; also soft cat-like purr, "brrr", given in display.

Breeding

Dec–Apr, occasionally later, in W, and mainly Oct–Mar in Northern Territory; often two broods raised in a season. Maintains territory of over 10,000 m2. Usually domed nest c. 22 cm tall and c. 26 cm in diameter, with side entrance c. 9·5 cm across, built by both sexes from sticks, bark strips, dead vines, leaves, grass, sometimes almost entirely from bamboo leaves, and lined with finer material; base of entrance sometimes covered with faecal pellets of mammalian herbivores; placed up to 8·5 m (mean 4·5 m) above ground in tree or palm, often on top of stump, less often on ground against buttress roots. Clutch 3–4 eggs, rarely 5, glossy creamy white with dark brown or red-brown rounded spots and underlying grey-lilac spots, average c. 26 - 21 mm; incubation by both sexes, period 14 days; both also take equal share in feeding chicks, in 92 feeds at eight nests food delivered at average interval of 7·5 minutes; young leave nest after 13–15 days, independent c. 2 weeks later. Success sometimes low; of 66 nests over several years at one site, 74·2 % lost through predation. Recorded longevity in wild at least 9 years.
Not globally threatened. Restricted-range species: present in North-west Australia EBA. Locally common. Nominate race common around Darwin; in Northern Territory, density of 1 bird/ha recorded in Kakadu National Park; mean of 0·4 birds/ha at various sites in Top End, where species recorded in 33 of 48 monsoon rainforests visited; and 7 individuals calling in c. 4 ha on Cobourg Peninsula. Deterioration of monsoon forest and edge caused by fires could possibly have adverse effect on its numbers, although detailed studies did not find this to be so. W population (johnstoneiana) less well known; formerly somewhat more widespread; on Mitchell Plateau (Kimberley), vegetation partially destroyed by feral cattle (Bos), resulting in greatly reduced area of feeding habitat and marked decline in numbers of this subspecies. Not reported in cagebird trade.
Distribution of the Rainbow Pitta - Range Map
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Distribution of the Rainbow Pitta

Recommended Citation

Erritzoe, J. (2020). Rainbow Pitta (Pitta iris), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.raipit1.01
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